ABAP Select data from SAP table ICL_BW_DIAGNOSIS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ICL_BW_DIAGNOSIS table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ICL_BW_DIAGNOSIS. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ICL_BW_DIAGNOSIS table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ICL_BW_DIAGNOSIS TYPE STANDARD TABLE OF ICL_BW_DIAGNOSIS,
      WA_ICL_BW_DIAGNOSIS TYPE ICL_BW_DIAGNOSIS,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ICL_BW_DIAGNOSIS> TYPE ICL_BW_DIAGNOSIS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ICL_BW_DIAGNOSIS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ICL_BW_DIAGNOSIS
  INTO TABLE IT_ICL_BW_DIAGNOSIS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICL_BW_DIAGNOSIS
*  INTO TABLE @DATA(IT_ICL_BW_DIAGNOSIS2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ICL_BW_DIAGNOSIS INDEX 1 INTO DATA(WA_ICL_BW_DIAGNOSIS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ICL_BW_DIAGNOSIS ASSIGNING <ICL_BW_DIAGNOSIS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICL_BW_DIAGNOSIS>-CLIENT = 1.
<ICL_BW_DIAGNOSIS>-ACTIVE = 1.
<ICL_BW_DIAGNOSIS>-CLAIM = 1.
<ICL_BW_DIAGNOSIS>-PATIENT = 1.
<ICL_BW_DIAGNOSIS>-SUBOBJCAT = 1.

ENDLOOP.

LOOP AT IT_ICL_BW_DIAGNOSIS INTO WA_ICL_BW_DIAGNOSIS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICL_BW_DIAGNOSIS-SUBOBJECT, sy-vline,
  WA_ICL_BW_DIAGNOSIS-DIAGNO, sy-vline,
  WA_ICL_BW_DIAGNOSIS-CHANGETIME, sy-vline,
  WA_ICL_BW_DIAGNOSIS-CHANGEDBY, sy-vline,
  WA_ICL_BW_DIAGNOSIS-DELETED, sy-vline,
  WA_ICL_BW_DIAGNOSIS-CATAID1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICL_BW_DIAGNOSIS you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ICL_BW_DIAGNOSIS TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ICL_BW_DIAGNOSIS INTO WA_ICL_BW_DIAGNOSIS.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field CLAIM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICL_BW_DIAGNOSIS-CLAIM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_BW_DIAGNOSIS-CLAIM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTAM, internal->external for field CHANGETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTAM_OUTPUT'
  EXPORTING
    input =                      WA_ICL_BW_DIAGNOSIS-CHANGETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_BW_DIAGNOSIS-CHANGETIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DIAID, internal->external for field DIAGID1
CALL FUNCTION 'CONVERSION_EXIT_DIAID_OUTPUT'
  EXPORTING
    input =                      WA_ICL_BW_DIAGNOSIS-DIAGID1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_BW_DIAGNOSIS-DIAGID1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DIAID, internal->external for field DIAGID2
CALL FUNCTION 'CONVERSION_EXIT_DIAID_OUTPUT'
  EXPORTING
    input =                      WA_ICL_BW_DIAGNOSIS-DIAGID2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_BW_DIAGNOSIS-DIAGID2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INJURED
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICL_BW_DIAGNOSIS-INJURED
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_BW_DIAGNOSIS-INJURED.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ICL_BW_DIAGNOSIS_STR, 
CLIENT TYPE STRING,
ACTIVE TYPE STRING,
CLAIM TYPE STRING,
PATIENT TYPE STRING,
SUBOBJCAT TYPE STRING,
SUBOBJECT TYPE STRING,
DIAGNO TYPE STRING,
CHANGETIME TYPE STRING,
CHANGEDBY TYPE STRING,
DELETED TYPE STRING,
CATAID1 TYPE STRING,
DIAGID1 TYPE STRING,
CATAID2 TYPE STRING,
DIAGID2 TYPE STRING,
DIAGNOPARENT TYPE STRING,
DESCRIPTION TYPE STRING,
ENDDATE TYPE STRING,
DIAGSRCCAT TYPE STRING,
DIAGSRCID TYPE STRING,
DIAGTYPE TYPE STRING,
LOCALIZATION TYPE STRING,
SEVERITYCODE TYPE STRING,
MORPHOLOGY TYPE STRING,
EXCORIATION TYPE STRING,
GUARANTEE TYPE STRING,
DEPARTMENT TYPE STRING,
DIAGORDER TYPE STRING,
LOCALIZATION2 TYPE STRING,
USED4CALC TYPE STRING,
ASSIGN_GUID TYPE STRING,
_DATAAGING TYPE STRING,
CLAIMTYPE TYPE STRING,
INJURED TYPE STRING,
DATELOSS TYPE STRING,
PLINEOFBUS TYPE STRING,
COMPANYCODE TYPE STRING,
ORGUNIT TYPE STRING,
UPDMOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICL_BW_DIAGNOSIS_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ICL_BW_DIAGNOSIS_STR-CLIENT sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-ACTIVE sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-CLAIM sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-PATIENT sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-SUBOBJCAT sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-SUBOBJECT sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DIAGNO sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-CHANGETIME sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-CHANGEDBY sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DELETED sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-CATAID1 sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DIAGID1 sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-CATAID2 sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DIAGID2 sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DIAGNOPARENT sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DESCRIPTION sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-ENDDATE sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DIAGSRCCAT sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DIAGSRCID sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DIAGTYPE sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-LOCALIZATION sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-SEVERITYCODE sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-MORPHOLOGY sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-EXCORIATION sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-GUARANTEE sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DEPARTMENT sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DIAGORDER sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-LOCALIZATION2 sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-USED4CALC sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-ASSIGN_GUID sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-_DATAAGING sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-CLAIMTYPE sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-INJURED sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-DATELOSS sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-PLINEOFBUS sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-COMPANYCODE sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-ORGUNIT sy-vline 
WA_ICL_BW_DIAGNOSIS_STR-UPDMOD sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.